72 NEW-YORK FAUNA — MOLLUSCA. 
LIMNEA LINSLEYI. 
PLATE IV. FIG. 74. a. B. 
(STATE COLLECTION.) 
Description. Shell ovate, subventricose. Whorls five, rounded, and rapidly attenuated to 
the apex: suture deep. Aperture oblong-oval, longer than the spire. Pillar-lip with a 
broad calcareous deposit ; the lower portion reverted, and partially covering the umbilicus. 
Lip thin, forming a shoulder at its junction with the preceding whorl. Body-whorl towards. 
the margin of the outer lip, flattened as in megasoma, and impressed with deep incremental 
striae which are evident from within. 
Color. Epidermis chesnut, often obscured by a blackish subvillous pigment. 
Length, 0°25. Aperture, 0°15. , 
This shell has affinities of form with catascopium, and more especially with the variety 
which is designated by Say as L. pinguis. That variety is, however, represented as having 
a moderate suture, and the whorls nearly four. I have ventured to impose upon it a new 
name, expressive of my obligations to the Revd. Mr. Linsley of Stratford, who furnished 
me with the specimens from his neighborhood. 
LIMNEA COLUMELLA. 
PLATE IV. FIG. 75. 
(STATE COLLECTION.) 
. columella, Say, Nich. Ency. Ed. Am. Vol. 4, No.3. Jour. Acad. Nat. Sciences, Vol. 1, p. 14; Vol. 2, p. 167. 
. macrostomus. Ib. Jour. Ac. Nat. Sc. Vol. 2, p. 170. 
. acuminata, Apams, Amer. Jour. of Science, Vol. 39, p. 374 (Young.). 
. columella, and var. chalybea, Gouxp, Invertebrata of Mass. p. 215, figs. 144, 145. 
id. Hatpeman, Monograph of Limniades, p. 38, pl, 12, figs. 1, 15. 
Sisal sists! 
Description. Shell ovate, ventricose, fragile, thin in texture, diaphanous: suture impressed 
and conspicuous. Whorls four, with incremental lines crossed by minute spiral strie. Spire 
narrow, acute, and much shorter than the aperture. Aperture very large, more or less 
expanded. Pillar-lip with a thin film of enamel, not quite appressed anteriorly: it is so 
much arched as to display a considerable portion of the interior of the shell. 
Color. Pale greenish, or straw-yellow. 
Length 0°5 - 1°0. 
This species has very much the aspect of a Succinea. Mr. Haldeman has very judiciously, 
as I think, united two nominal species into one. It abounds from Canada to South-Carolina. 
In this State, I have procured specimens from the locks at Schenectady, and throughout the 
western district. 
